| 一种改进的基于DCT的信道估计迭代算法 |
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| 引用本文： | 杨柳,刘汉奎,郝希准,边刚.一种改进的基于DCT的信道估计迭代算法[J].西华师范大学学报(哲学社会科学版),2011(1). |
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| 作者姓名： | 杨柳 刘汉奎 郝希准 边刚 |
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| 作者单位： | 西华师范大学物理与电子信息学院; |
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| 基金项目： | 四川省教育厅重点实验室专项基金资助项目(2006ZD026) |
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| 摘 要： | 提出了一种适用于正交频分复用系统信道估计的基于DCT的改进迭代算法.该算法通过迭代修正传统DCT/IDCT方法估算出的频率响应幅值和相位偏移,能有效抑制加性高斯白噪声和载波间干扰影响.仿真结果表明,与未采用迭代的DCT/EIDCT算法相比,该算法有更好的性能;与采用DCT/EIDCT初始化的迭代算法相比,该算法具有与其几乎相同的性能,但实现更简单;同时,该算法的迭代次数可通过在初始化过程中引入幅值补偿而大大减少.
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| 关 键 词： | 正交频分复用 信道估计 离散余弦变换 迭代算法 |
An Improved DCT-based Iterative Algorithm for Channel Estimation |
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| YANG Liu,LIU Han-kui,HAO Xi-zhun,BIAN Gang.An Improved DCT-based Iterative Algorithm for Channel Estimation[J].Journal of China West Normal University:Natural Science Edition,2011(1). |
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| Authors: | YANG Liu LIU Han-kui HAO Xi-zhun BIAN Gang |
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| Institution: | YANG Liu,LIU Han-kui,HAO Xi-zhun,BIAN Gang(School of Physics and Electronic information,China West Normal University,Nanchong,637002) |
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| Abstract: | An improved DCT-based iterative algorithm is proposed to implement the channel estimation in orthogonal frequency division multiplexing(OFDM) system.It can significantly reduce the effects of additive white Gaussian noise and inter-carrier interference on the channel estimation since the amplitude and phase offset of obtained channel frequency response are modified through the DCT/IDCT iterations.The simulation results show that the improved DCT-based iterative algorithm performs better than the DCT/EIDCT a... |
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| Keywords: | OFDM channel estimation discrete cosine transform iterative algorithm |
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